Telegraphy.



TELEGRAPH. APPLICATION FILED we.24, ,191o.

Patented Apr.18',19.11

. ATTURNEY' INVEMTOR WITNESSES:

nnrrnn s'rarns rarnia'r ornion.

PATRICK B.

TELEGRAPHY.

1 '0 all whom/it may concern? Be t known that I, PATRICK ll. Damn r, a -c1t1z en of the Un ted rrltates. residing; at

South Orange, Essex county. State of New p actically stablecondition electrically, re-

gardless of the number of way stations using the automatic apparatus or the Morse instrument, the arrangement being such that a change from one-system to the other at .one or all of the stations does not disturb materially the normal working; condition of the circuit. This is attained by shunting the Morse relay at each station-with a resistance and, when the chemical recorder is in use, itis in shunt to both t-he'relay and the resistance. The arrangement is such that when the starting lever of the chemical recorder is moved to throw the recorder into operation, the resistance of the shuntaround the relay is increased to a degree equivalent to the lowering of the resistance oft-he circuit when the chemical recorder is placed in shunt around the resistance and relay and when the recorder lever is returned to normal position to throw the recorder out of circuit, the resistance shunt is restored to its normal resistance value. Experience has shown that when there is a resistance shunt of about 1.000 ohms around the Morse relay having a re sistance of" about 150 ohms, and both are shunted bythe chemical recorder sutticient current will be diverted through the latter to make a plain record at high speed over an ordinary circuit. Owing to the self-induction of the relay, the record will he plain and distinct. As the resistance of the tape of the chemical recorder may be made to approximate 500 ohms, the variation. caused by the recorder being thrown into or out of operation, will be compensated by automatically changing the resistance otthe Specification ofLetters Patent,

Application filed August 24, 1910; Serial No. 578,719.

DELANY, or. SOUTH ore linen, NEW Jensen, ASSIGN-OR To THE COMPANY, or NEW YORK, n. r, A oonrona'sron or MAINE. I

PatentedApr.

resistance coil to the extent of'5QO joln" each time the recorder lever is illic ted, -i creasingthe resistance otthe coil *inone case and deceasing it in the other. Thus it will llQ seen that normally all the signal ing relays in the circuitare shunted by resistance of fixed 'alue, say'500 ohms, that all are on a par. If atei'minal oifice,

tor instance, should wish to send automati 'f cally to one of the way offices, th tirftroduction of the chemical recorder as an"additional shunt at the way otiice does not destroy the balance or the circuit and all'the other relays lacing in adjustment they would show automatically that the line is in use Should a terminal ottice desire to drop a copy at all the stations, each station would be equally provided with current. The re sistance shunts around the relays may" be regulated to the resistance of the particular relays in use, the resistance of the line, and the power used in transmission. Once this adjustment or adaptation is properly made,

no alteration would be necessary as Varying conditions of the line will affect the arrangement of the relays, resistance shunt and chemical recorder shunt in the ratio of their permanent relationship.

The accompanying drawing is a diagrammatic View, illustrating this invention:

A. represents a transmitting station; B a way station receiving" on its chemical recorder; C a way station not receiving on its recorder but like the other stations-its Morse relay is in circuit; 1) represents a terminal station receiving on its recorder.

At sending station A, f, I" are the tansmuting contact fingers pressing on top of a perforated transmitting tape 1); If", t are contacts beneath. the tape connected to the terminals of battery (7 the middle of which is connected through the coils of a polarized relay trai'ismitter R to the upper contact lingers z, t. The armature a of the relay connected to line L. hen the lower one of two pertmrations in line perpendicular to tape. 7). representing a dot, passes between the upper contact If and the lower contact 25 a positive impulse is sent through the coils of polarized relay R and moves its armature (r to contact c. A current is then sentinto the main" line L from main battery MB and a record is made on chemical tapes h, at intern'iediate station B and terminal station I) until the upper one of said pair of perfoand sounder M.

rations in transmitting tape by passes between contacts't, t'fwhen the negative pole of battery cl reverses polarized, relay R breaking :the circuit of the line and main battery MB at c. The. time between contact through the lower andnpperperpendicular perforations represents a clot. ,The next two. perforat ons being angularly placed cause a longer time to elapse between the impulses in-the' local circuit and the armature a of POlHI'IZGCl relay R is held against its contact for a time, representing a dash, WhlCll,

' with the preceding dot signal, constitutes the h the resistances of shunts N were increased from say 500; ohms to 1000 ohms by the levers 0 being moved frompoints 1- of the resistance coils to points 1 but this change was offset bv' the contact of the recording fingers with the chemical" tapes which at B and D created another shunt around the relay and resistance equivalent to the rise in the resistances N. The relay at C therefore remained in adjustment and gave notice that the line was being used for automatic transmission. If C- had also taken a copy of the message on his recorder, B and D would not have been affected by.it for the reasons already described.

' s It is not deemed necessary to describe the operation of the Morse features of the system, the relays, sounders and keys being disposed in the ordinary and well known way.-

if need be, for ordinary traffic when the rapid automatic system is not required.

I claimi 1. In telegraphy-the combination of acir- The Morse is used for calling, ac-' knowledgmerits of automatic reception or,

cuit, a transmitter therein, an electro-mag-.

netic receiver in the circuit, a resistance shunting the electro-magnetic receiver and-a chemical recorder shunting the electro-magnetic receiver and the resistance.

2. In telegraphy the combination of a circuit, an electro-magnet therein, a resistance 'in parallel. with the electro-magnet and a chemical recorder in parallel with t e electro-magnet and the resistance. I 3. In telegraphythe comb nation of-a c1rcuit, a transmitter therein, an elect-ro-magnet' 1n the c1rcu1t,'a resistance in parallel With.

the electro-n'iagnet, a receiver in arallel with the electro-magnet and the resistance, and means controlled. by said receiver for varying the resistance of said resistance.

4:. In telegraphy the combination of a circuit, a transmitter in said circuit, two receivers in parallel in the circuit and a resistance in parallel with both receivers.

In testimony whereof, I have hereunto subscribed my name.

PATRICK B. DELANY.

\Vitnesses LAURISTON- BUNKER, v EMMA 0001:. 

